Hcg dropped them rose back up.

Alycia

My hcg 10/30 was a 19 then went down 11/2 to a 7. 10/30 was the day that the doctor told me it was a miscarriage. We did do the deed that day to help with emotions and he did finish in me. I had continued to feel cramps and was still getting positive pregnancy tests. So I got more blood work done today and it rose to a 13. What do you think is the reason?